Full reference: O. P. Hay. 1908. The fossil turtles of North America. Carnegie Institution of Washington Publication 75:1-568
Sister taxon: Glyptops plicatulus
Type specimen: AMNH 1018, a partial shell (front and the dorsal region of the carapace and the greater part of the plastron). Its type locality is 10 miles east of Pryor, which is in a Cenomanian marine shale in the Graneros Shale Formation of Montana.
Ecology: facultatively mobile amphibious